> “ It won’t matter what he says or does.”
Not true in general. Trump supporters are not happy with all of his acts.
The key thing to understand is that Trump can beat the media, Cruz cannot. Cruz can win any debate but he won’t be allowed to debate, he will be demonized and maligned. Everything else does not matter in terms of the general.
Trump prevails only when he can personalize his target. When the MSM opens up on him they will reduce him to rubble fast. And he does not enjoy enough public goodwill to make any difference.